<!DOCTYPE html>
<html>
<head>
    <meta charset='UTF-8'>
    <title>block 嵌入 inline</title>
    <style>
        div {
            outline: red dotted;
        }
        a {
            background: green;
            padding: 10px;
            display: block;
            
            text-decoration: none;
            color: white;
        }
     </style>
</head>
<body>
    <div>
        <a href="">Fuck You!</a>
    </div>
</body>
</html>